DOMESTIC WATER RECORDS

Transcription

1 DOMESTIC WATER RECORDS LEGIONELLA LOG BOOK RESPONSIBLE SITE STAFF PARSONS HALL INDUSTRIAL ESTATE HIGH STREET IRCHESTER NORTHANTS NN29 7AB TEL: FAX:

2 DOMESTIC WATER RECORDS RECEIPT OF LEGIONELLA LOG BOOK Site This Domestic Services Legionella Log Book has been received by the Holder. Name.. Signature. PARSONS HALL INDUSTRIAL ESTATE HIGH STREET IRCHESTER NORTHANTS NN29 7AB TEL: FAX:

3 DOMESTIC WATER RECORDS RECEIPT OF LEGIONELLA LOG BOOK Site This Domestic Services Legionella Log Book has been received by the Holder. Name.. Signature. PARSONS HALL INDUSTRIAL ESTATE HIGH STREET IRCHESTER NORTHANTS NN29 7AB TEL: FAX:

4 LOG BOOK INDEX 1. Written scheme and Responsibilities 2. List of sample points 3. Weekly shower test 4. Monthly temperature logs (taps, tanks & calorifiers) 5. Fault report forms 6. Quarterly shower cleaning 7. Beacon service sheets, bacteria reports & water sampling guidelines 8. Miscellaneous works 9. Beacon cleaning & disinfection records 10. Annual storage tank inspection report

5 LEGIONELLA CONTROL WRITTEN SCHEME MONTHLY Record the temperatures at a variety of selected taps from throughout the system that will give representative readings plus sentinel taps. o The hot should reach at least 50 C after 1 minute, if no TMV is fitted o All hot taps with Thermostatic Mixing Valves (TMV) should be checked to verify a safe set point of approximately 43ºC o The cold should be below 20 C after 2 minutes Sentinel taps are defined as the nearest and furthest outlets on the hot and cold water system and should be from around the extremities of the system if the building is large or complex. These should be checked every month and should not be fitted with, or fed by, Thermostatic Mixing Valves. Record the hot and cold water storage temperature; The hot should be at least 60 C, the cold should be below 20 C. QUARTERLY Clean, descale disinfect all shower heads, also disinfect shower hoses if fitted. Purge and record the temperature of the shower mixers The mixed supply should be able to achieve at least 43 C after 1 minute. Take water samples to monitor the bacteria levels in the system. ANNUALLY Inspect the hot and cold water storage and arrange for a clean and disinfection if required ALWAYS REPORT S TO THE SCHEME MANAGER SECTION 1

6 OPERATING PROCEDURES CONTROL OF LEGIONELLA AREAS OF RESPONSIBILITY Task Hot water tap test Cold water tap test Calorifier test Calorifier blowdown Tank temperature test Clean & chlorination of showers / spray taps Microbiological water samples Inspection of tank(s) Clean & chlorination of tank(s) Disinfection of system(s) Flush unused outlets Maintenance of Records Maintenance & archiving of records Responsibility Beacon / Client Beacon / Client Beacon / Client / Other Beacon / Client Beacon / Client Beacon / Client Beacon / Client Beacon / Client Beacon / Client Beacon / Client Beacon / Client Beacon / Client This responsibility rests with the Client. All tests in compliance with L Legionella Code of Practice SECTION 1

7 SAMPLE LOCATIONS FOR WATER MONITORING SHOWER LOCATION SENTINEL TAPS COLD WATER TANKS HOT WATER CALORIFIERS SECTION 2

8 SAMPLE LOCATIONS FOR WATER MONITORING SHOWER LOCATION SENTINEL TAPS COLD WATER TANKS HOT WATER CALORIFIERS SECTION 2

9 WEEKLY CHECK OF SHOWER OPERATION LOCATION OK (Y/N) SECTION 3

10 WEEKLY CHECK OF SHOWER OPERATION LOCATION OK (Y/N) SECTION 3

11 WEEKLY CHECK OF SHOWER OPERATION LOCATION OK (Y/N) SECTION 3

12 WEEKLY CHECK OF SHOWER OPERATION LOCATION OK (Y/N) SECTION 3

13 WEEKLY CHECK OF SHOWER OPERATION LOCATION OK (Y/N) SECTION 3

14 WEEKLY CHECK OF SHOWER OPERATION LOCATION OK (Y/N) SECTION 3

15 MONTHLY TEMPERATURE MONITORING (TAPS) LOCATION HOT TEMPERATURE AFTER 1 MIN (Control : 50 C or above) COLD WATER TEMPERATURE AFTER 2 MIN RUNNING (Control : 20 C or below) SECTION 4

16 MONTHLY TEMPERATURE MONITORING (TAPS) LOCATION HOT TEMPERATURE AFTER 1 MIN (Control : 50 C or above) COLD WATER TEMPERATURE AFTER 2 MIN RUNNING (Control : 20 C or below) SECTION 4

17 MONTHLY TEMPERATURE MONITORING (TAPS) LOCATION HOT TEMPERATURE AFTER 1 MIN (Control : 50 C or above) COLD WATER TEMPERATURE AFTER 2 MIN RUNNING (Control : 20 C or below) SECTION 4

18 MONTHLY TEMPERATURE MONITORING (TAPS) LOCATION HOT TEMPERATURE AFTER 1 MIN (Control : 50 C or above) COLD WATER TEMPERATURE AFTER 2 MIN RUNNING (Control : 20 C or below) SECTION 4

19 MONTHLY TEMPERATURE MONITORING (TAPS) LOCATION HOT TEMPERATURE AFTER 1 MIN (Control : 50 C or above) COLD WATER TEMPERATURE AFTER 2 MIN RUNNING (Control : 20 C or below) SECTION 4

20 MONTHLY TEMPERATURE MONITORING (TAPS) LOCATION HOT TEMPERATURE AFTER 1 MIN (Control : 50 C or above) COLD WATER TEMPERATURE AFTER 2 MIN RUNNING (Control : 20 C or below) SECTION 4

21 MONTHLY TEMPERATURE MONITORING (TAPS) LOCATION HOT TEMPERATURE AFTER 1 MIN (Control : 50 C or above) COLD WATER TEMPERATURE AFTER 2 MIN RUNNING (Control : 20 C or below) SECTION 4

22 MONTHLY TEMPERATURE MONITORING (TAPS) LOCATION HOT TEMPERATURE AFTER 1 MIN (Control : 50 C or above) COLD WATER TEMPERATURE AFTER 2 MIN RUNNING (Control : 20 C or below) SECTION 4

23 MONTHLY TEMPERATURE LOG COLD WATER TANKS AND HOT WATER CALORIFIERS LOCATION / IDENTIFICATION RECORD TEMPERATURE (Cold water tank should be less than 20 C) (Calorifier should be at least 60 C) SECTION 4

24 MONTHLY TEMPERATURE LOG COLD WATER TANKS AND HOT WATER CALORIFIERS LOCATION / IDENTIFICATION RECORD TEMPERATURE (Cold water tank should be less than 20 C) (Calorifier should be at least 60 C) SECTION 4

25 MONTHLY TEMPERATURE LOG COLD WATER TANKS AND HOT WATER CALORIFIERS LOCATION / IDENTIFICATION RECORD TEMPERATURE (Cold water tank should be less than 20 C) (Calorifier should be at least 60 C) SECTION 4

26 MONTHLY TEMPERATURE LOG COLD WATER TANKS AND HOT WATER CALORIFIERS LOCATION / IDENTIFICATION RECORD TEMPERATURE (Cold water tank should be less than 20 C) (Calorifier should be at least 60 C) SECTION 4

27 3 MONTHLY CLEAN, DESCALE & DISINFECTION OF SHOWER HEADS & HOSES PLUS TEMPERATURE LOG LOCATION CLEAN, DISINFECTION & DESCALE COMPLETED (Y/N) TEMPERATURE LOG (Shower should achieve at least 43 C after 1 minute s running) SECTION 6

28 3 MONTHLY CLEAN, DESCALE & DISINFECTION OF SHOWER HEADS & HOSES PLUS TEMPERATURE LOG LOCATION CLEAN, DISINFECTION & DESCALE COMPLETED (Y/N) TEMPERATURE LOG (Shower should achieve at least 43 C after 1 minute s running) SECTION 6

29 3 MONTHLY CLEAN, DESCALE & DISINFECTION OF SHOWER HEADS & HOSES PLUS TEMPERATURE LOG LOCATION CLEAN, DISINFECTION & DESCALE COMPLETED (Y/N) TEMPERATURE LOG (Shower should achieve at least 43 C after 1 minute s running) SECTION 6

30 3 MONTHLY CLEAN, DESCALE & DISINFECTION OF SHOWER HEADS & HOSES PLUS TEMPERATURE LOG LOCATION CLEAN, DISINFECTION & DESCALE COMPLETED (Y/N) TEMPERATURE LOG (Shower should achieve at least 43 C after 1 minute s running) SECTION 6

31 GUIDANCE NOTES UNDERSTANDING TOTAL BACTERIA AND LEGIONELLA REPORTS Sample reports are issued without a covering letter but all reports will indicate whether the results are satisfactory or whether remedial action is required. It is important to note the status boxes at the top of the letter. If the satisfactory box is ticked then there is no further action required. If some or all of the results are high then the remedial action required box will be ticked. The attached notes give a general explanation of the various potential results and the appropriate level of response. Unfortunately it is not often a simple pass or fail scenario. NOTE : Legionella counts are per litre, whereas Total Viable Counts are per Millilitre; the Legionella test is therefore one thousand times more sensitive. DOMESTIC SERVICES LEGIONELLA IN SHOWERS AND DOMESTIC DOWN SERVICES If legionella are detected up to a level of 1,000 cfu/l the system should be thermally disinfected and shower heads should be removed and disinfected. Showers should be labelled as out of action until the results of a retest are known. It is also advisable to review and audit the routine control measures. If legionella is detected at 1,000 cfu/l or above the infected systems may be taken out of service, subject to discussion with the scheme manager. They will remain out of order until they have been cleaned, disinfected and retested. It is also essential to survey the system to try to identify the possible source of the infection. All remedial works will be completed at the discretion of the scheme manager. The level of response will be affected by the overall level & number of positive results detected in a batch of sample(s); ie. a low legionella count in all the samples may be as serious as a high count in only one sample. SECTION 7

32 TOTAL VIABLE COUNTS IN DRINKING AND DOMESTIC WATER Total viable counts refer to an overall count of all the bacteria present in the water sample. This is a count of both harmful and harmless organisms. The recommended levels for drinking water are very precise. The water sample is split and incubated at two different temperatures; the limits are as follows: 1 37 C less than 10 cfu/ml 3 22 C less than 100 cfu/ml Ideally, the water in the domestic down services also conforms to the above limits. However, in view of the fact that domestic down service water (basin taps, showers, etc) are not intended for drinking there is more leeway on the interpretation of the results; guidance as per Appendix 1. OTHER PATHOGENS The following organisms should always be absent from drinking and domestic water. Pseudomonas spp. / aeruginosa Faecal Enterococci / Streptococci Coliforms E. Coli If these organisms are detected the system should be cleaned and disinfected as soon as possible and the source of the infection investigated. SECTION 7

33 APPENDIX 1: DOMESTIC AND DRINKING WATER SERVICES TOTAL VIABLE COUNTS: RECOMMENDED LEVELS (22 C COUNTS) DOMESTIC SERVICES (incl Showers) < day count <1 1,000 cfu/ml 3 day count Acceptable 100 or above 2 day count 1,000 or above 3 day count Remedial action required DRINKING WATER < day count <1 100 cfu/ml 3 day count Acceptable 10 or above 2 day count 100 or above 3 day count Remedial action required * cfu = colony forming unit or the number of viable (live and able to multiply) bacteria in the sample KEY TO TVC RESULTS DRINKING WATER TVC up to ºC, 3 days up to C, 2 days TVC ºC, 3 days C, 2 days Acceptable. Slightly high but not excessive. Verify that water temperatures are correct. TVC ºC, 3 days C, 2 days TVC 2000 cfu/ml and 22ºC, 3 days 200 cfu/ml and 37ºC, 2 days TVC too high; flush the outlet thoroughly and clean if inspection shows it to be dirty. Verify that water temperatures are correct. TVC excessive; clean and disinfect the outlet as soon as possible. A system disinfection may also be required. Verify that water temperatures are correct. HOT WATER (BASIN) COLD WATER (BASIN) MIXED SUPPLY (BASIN) MIXED SUPPLY (SHOWER) HOT WATER STORAGE COLD WATER STORAGE TVC up to ºC, 3 days C, 2 days TVC ºC, 3 days C, 2 days TVC 5000 cfu/ml and 22ºC, 3 days 500 cfu/ml and 37 C, 2 days Acceptable. Slightly high; we would recommend flushing the outlets and checking for any debris in spray plates or shower heads. Verify that water temperatures are correct. TVC excessive; definitely clean and disinfect outlets and/or shower heads and flush thoroughly. Verify that water temperatures are correct. These levels are very much for guidance and should be viewed in context. SECTION 7

34 WATER SAMPLING PROCEDURE Work Instruction 1. Subject Bacteriological sampling 2. Scope The collection of samples for further laboratory analysis 3. Management Directive Procedure to be performed in accordance with this document 4. Method 4.1 Sample bottles are supplied by the testing laboratory and are obtained via the office. 4.2 When samples have been collected they are to be processed as soon as possible, and if necessary kept in a refrigerator until ready for dispatch. 4.3 (Where possible Legionella samples should not be refrigerated as degradation is liable to occur) 4.4 Do not keep cold and hot samples in close proximity to each other after sampling 4.5 Ensure that each sample is identified with the information provided by the Office when checking in the sample 4.6 Avoid handling the bottle by the cap or neck prior to sampling Sampling from Taps (Hot & Cold) 4.7 Open the tap and run at moderate flow for 2 minutes; fill the bottle directly from the flow Sampling from Tanks 4.8 If sample taps available follow step 4.7. If no tap available sample tank from point furthest from ball valve. Immerse bottle (cap on) as far as possible collect sample and recap still underwater. Sampling from Softeners 4.9 Sample from the bib tap or the first available outlet by opening fully to fill the sample bottle. ** Further advice is available in BS7592: Responsibilities 5.1 The person carrying out sampling is responsible for the correct procedure SECTION 7

35 MISCELLANEOUS WORK SHEET WORK CARRIED OUT COMPANY SECTION 8

36 MISCELLANEOUS WORK SHEET WORK CARRIED OUT COMPANY SECTION 8

37 MISCELLANEOUS WORK SHEET WORK CARRIED OUT COMPANY SECTION 8

38 MISCELLANEOUS WORK SHEET WORK CARRIED OUT COMPANY SECTION 8

39 RISK ASSESSMENT DISINFECTION AND CLEANOUT OF WATER STORAGE TANKS 1. IDENTIFICATION OF HAZARDS a. Lifting injury b. Injury from falling c. Injury from chemical spillage d. Hazard caused by unnecessary production of aerosol e. Injury from faulty equipment f. Inadequate ventilation 2. SUSCEPTIBLE PERSONS a. The Service Provider personnel, risk category 1a, 1b, 1c, 1d, 1e, 1f b. Site personnel, risk category 1c, 1d 3. RISK EVALUATION CATEGORY 2a All personnel are suitably trained to complete cleaning and disinfection works in accordance with the Health & Safety at Work Act (1974). They will also follow relevant legislative guidelines and internal quality procedures to ensure safe working. Appropriate PPE will be worn as required. All equipment to be PAT tested (as applicable) and adequately maintained. The level of risk for items 1a, 1b, 1c, 1d, 1e and 1f may be considered as medium. CATEGORY 2b Suitable precautions will be taken to minimise aerosol product (item 1d) Also, site personnel are not permitted within the working area. The overall level of risk may be considered as low. 4. SAFE SYSTEM OF WORK It is mandatory that personnel conduct all works in accordance with the aforementioned statements: All PPE to be worn All ladders/scaffold to be secure All chemicals to be handled correctly All heavy items to be lifted correctly Aerosol production to be minimised All equipment maintenance schedules to be up to date SECTION 9

40 PROCEDURE 1. Subject Sterilisation of Water Storage Tanks by spraying with Chlorine Dioxide or Chlorine solution 1 Warning notices are to be displayed on all relevant control valves. 2 Ensure that all site staff are aware of the procedure is to start. 3 Isolate the Tank. 4 Drain and visually inspect. 5 Ensure there is satisfactory access and ventilation. Use protective equipment and breathing apparatus as appropriate. 6 Prepare a 20ppm solution of Chlorine Dioxide or 50ppm of Chlorine. 7 Sluice the Tank down with fresh water and remove any debris. 8 Spray the internal surface of the tank with 20ppm Chlorine Dioxide or 50ppm Chlorine. Repeat every 15 minutes for 2 hours. 9 Neutralise with CN65 10 All warning notices are then to be removed. 11 A Sterilisation Method Statement Worksheet must be completed, signed by the client s representative and filed in the Log Book. The blue copy is to be returned to Head Office for issue of the Certificate. SECTION 9

41 PROCEDURE 1. Subject Sterilisation of Mains & Tank Fed Down Services Warning notices are to be displayed at every outlet on the system and on all relevant control valves. Ensure that all site staff are aware of the procedure is to start The entire mains and drinking water system is to be sterilised by injecting sterilant into the pipe. Whilst Sterilant is being injected all service outlets are to be checked until a level of 20ppm Chlorine Dioxide, or 50ppm Chlorine, is reached. This operation is to be carried out without risk of contamination to the authority mains or where applicable to the existing system if new installation is involved. The entire system shall be left fully charged for a period of 1 hour with a reserve of not less than 20ppm Chlorine Dioxide or 50ppm Chlorine. All cistern lids, tank covers etc. must be in position throughout this time. A test of the reserve should be carried out at the end of the time period to ensure 12ppm Chlorine Dioxide, or 30ppm Chlorine as a minimum reserve. If reserve is too low the procedure should be repeated. The entire system should then be flushed to remove all sanitiser. Down Services All storage tanks are to be inspected and any debris removed. All tanks, calorifiers and hot and cold distribution services (including pumped systems if applicable) are to be thoroughly flushed to remove any detritus. The tanks should then be refilled as required and Chlorine shall be added to achieve 50ppm, or Chlorine Dioxide at 20ppm, using the appropriate test kit. All calorifiers and hot and cold down service outlets are to be run until a chlorine reserve of 50ppm, or Chlorine Dioxide to 20ppm, is achieved and maintained. The entire system is to be left for 1 hour during which time the level of chlorine should be checked to ensure 30ppm minimum, or 12ppm Chlorine Dioxide. Upon successful completion the entire system is to be flushed with fresh water until the sanitiser reserve at all outlets is equal to that of the incoming water. All warning notices are then to be removed. A Sterilisation Method Statement Worksheet must be completed, signed by the client s representative and filed in the Log Book. The blue copy is to be returned to Head Office for issue of the Certificate. SECTION 9

42 COLD WATER SERVICES WATER TANK INSPECTION FORM COMPANY: SITE: SYSTEM REFERENCE: YEAR: TANK NUMBER COMMENTS SATISFACTORY YES/NO TEMP ºC NATURE OF REMEDIAL ACTION TAKEN ACTION TAKEN Inspection must include: Internal inspection for cleanliness, rust and corrosion, sediment and sludge. Security of lid, vent screen, overflow screen. Any indication of ingress of insects and vermin External cleanliness, eg. pigeons, dust and dirt accumulation on lid and in tank room generally. Condition of insulation. Water leakage. SECTION 10

43 COLD WATER SERVICES WATER TANK INSPECTION FORM COMPANY: SITE: SYSTEM REFERENCE: YEAR: TANK NUMBER COMMENTS SATISFACTORY YES/NO TEMP ºC NATURE OF REMEDIAL ACTION TAKEN ACTION TAKEN Inspection must include: Internal inspection for cleanliness, rust and corrosion, sediment and sludge. Security of lid, vent screen, overflow screen. Any indication of ingress of insects and vermin External cleanliness, eg. pigeons, dust and dirt accumulation on lid and in tank room generally. Condition of insulation. Water leakage. SECTION 10